We're going to turn to this video. We just showed you, incredible, really. A fiery crash, and a dramatic rescue. You see the burning car there on the 405 freeway, the major artery of los angeles. Good samaritans became heroes when they risked their lives to save the driver trapped in those flames. Aditi roy talked to one of the heroes. Good morning to you, aditi. Reporter: Good morning, josh. Don thompson is an lapd bomb squad officer. He was on his way to work when he saw a horrific accident right before his eyes. He sprung into action with just seconds to save a man's life. A ball of fire on one of california's busiest freeways, turned a quiet christmas day into an unforgettable one. I saw this car just veer into the retaining wall. It went all the way across all lanes. And it was on fire at that time. Reporter: Lapd bomb squad officer don thompson was on his way to work when he saw this car crash and then burst into flames. Instead of leaving the fire, he ran to it and found the car's driver unconscious and trapped. Had to get him out of here. All the while, there is all of this fire. Reporter: Witnesses capturing the scene on camera. The 26-year veteran lapd officer couldn't unbuckle the seat belt. The searing flames running up his arm. Thompson pulls away. But knowing he had only seconds left to save the driver, he goes back in. He was either going to live or die. His window of opportunity was maybe 10, 15 seconds. That's all he had. Reporter: Thompson is disoriented as he pulled the survivor out. Good samaritans rushed in. A passerby couldn't believe what he was documenting on camera. He opened the car door. Reached in there and grabbed this guy out. Reporter: The driver suffered only minor injuries and was arrested for suspicion of driving under the influence. Thompson says what happened was extraordinary. But that he is not. Everyone's calling you a hero. Do you feel that way? No. I don't feel that way at all. Reporter: All in a day's work. And after that long day was over, officer thompson told me he came home. And the first thing his wife of nearly 20 years said was, can you please put the whites in the drier. I guess even heroes have to do laundry. Aditi, thank you for that story. That's a wonderful one.

This transcript has been automatically generated and may not be 100% accurate.

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